Samsung RF265AB Service Manual page 65

TROUBLESHOOTING
4-2-7. When alarm sound continuous without stop(related with buzzer sound)
If 'ding-dong' sounds continuously
Door & MICOM State
F
Door MICOM
(#50)
Close 5V(High)
Open 0V(Low)
Separate the door switch and check if
the measured value of unit is
changed from 0
to switch ON/OFF.
* FF Door Switch is magnetic switch .
(it can be operated when door
magnet is combined with)
If 'beep-beep' sounds continuously
Is water penetrated
into the door switch?
R MICOM(#3)
voltage of main #50 and #3
Right and Left changed at door-open,
0V(Low)
5V(High)
Is the connector(CN30)
to according
Is the door switch unit
Recheck MAIN PCB and
Does buzzer sounds
when power On again?
Check if there is any short parts
due to foreign matters and the
test jumper part in the main-
PCB.
Start
Door is ajar
Is door closed
completely?
Is the input
door-close?
inserted correctly?
normal?
door switch
Start
Is manual operation
/defrost selected?
66
Remove causes after comprehending
the conditions of interference by door
gasket, food etc.
Replace Door S/W
Repair wire connection and
Door S/W
Connector is not inserted,
Repair bad contact
Replace Door S/W
Enforce the cancelation the
manual operation/ defrost function
or power On after power Off
MAIN PCB normal